Design cert at associate level; it is not easy to pass since Data center has been added. the CCDA Cert will be gone after Feb 24th. a Pro level cert CCDP will still exist after Feb 24th 2020 and since there will be no prerequisite for any Pro level certs after Feb 24th, you may wanna go straight to Pro level (study now, pass exam after Feb 24).
best of luck!
For official information regarding the CCDA certification. Its always better to get first hand information from the official site, you can read in detail about the CCDA certification at the following link:
For information related to the Exam Topics, you can check the following link:
Information related to study material can be found at the following link:
You can find FREE practice at the following link:
Furthermore, I recommend that you check the FREE recorded study sessions by a Great community member: Daniel Dib. Where he explains very well all you need to know about Network Design and the certifications including the CCDA. You can check them out at the following links:
Please remember you hvae until February 23rd. to complete your CCDA certification. You can read more about the upcoming changes to the CCNA including the CCDA certification at the following link: CCNA Certification and Training Program
I hope this information is helpful for you.
I wish you all the best in your CCDA studies.